Page 7-4 Troubleshooting
Revised 10/14
ITW Dynatec
D SERIES V6 DCL ASU Manuals
Handling Modules and Printed Circuit Boards (PCBs)
The Dynamelt ASU and DynaControl controller utilize several printed circuit boards (PCBs). These
boards are extremely sensitive to electrostatic charges. When working near or with any PCBs, the
following procedures must be followed to avoid damage to them.
CAUTION: Printed circuit boards (PCBs) should be handled using the following
procedures:
1. Wear a wrist grounding strap. If a grounding strap is not available, frequently touch a
bare metal part of the ASU (unpainted frame, mounting screw, etc.) to safely discharge
any electrostatic buildup on your body.
2. Handle a PCB by its edges only. Don’t grip a PCB a cross its surface.
3. When removed from the ASU, each PCB must be individually packaged inside a
metallized, static drain envelope. Do not place the removed PCB on a table, counter,
etc. until it has first been placed in or on a static drain envelope.
4. When handing a PCB to another person, touch the hand or wrist of that person to
eliminate any electrostatic charge before you hand the PCB to him.
5. When unwrapping a PCB from its static drain envelope, place the envelope on a
grounded, nonmetallic surface.
6. To cushion PCBs for shipment, use only static-drain bubble pack. Do not use foam
peanuts or bubble pack not known to be static draining.
The following pages d etail the Dynamelt D Series PCBs.
DANGER HIGH VOLTAGE
Before unplugging connectors from the I/O PCBs, ground yourself to the
ASU by t ouching any available unpainted cool metal surface, mounting
screws, etc. This will avoid electrical discharge to the PCB assembly when you are remov-
ing and replacing connectors.
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